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Chemistry Questions and Answers March 11, 2020

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Is there a different definition of software architecture that you are familiar with? If so, think about the ways in which this definition supports our acid test of architecture: Does it abstract information away from the system and yet provide enough information to be a basis for analysis, decision making, and risk reduction?

Compressed air is used to inflate a partially collapsed bounce house from 195L to 17900 L against a constant atmospheric pressure of 0.979 atm. Calculate the P-V work done by the air on the surrounding in L-atm. Calculate the P-V work done by the air on the surrounding in KJ.

Calculate the rate constant at 500 K for the second-order gas-phase reaction between Cl and H 2 , given the frequency factor, A-8.1x10 -10 dm 3 mol -1 s -1 and activation energy E a = 23 kJ mol.

According to the following reaction, what amount of Al253 remains when 12.55 g of Al2S3 and 2.00 g of H20 are reacted A few of the molar masses are as follows Al2S3 150.17 gmol, H20 18,02 gmol. AlzSa(s) 6 H20) 2 Al(OH)3(s) 3 H2S(g)

Carbonic acid can form water and carbon dioxide upon heating. What mass, in grams of carbon dioxide is formed from 51.5 g of carbonic acid H2CO3 H20 CO2

set up mass and charge balance equations for these solutions. i) solid ca(io3)2 is put in deionized water and dissolves until the solution is saturated. ii) solid ca(io3)2 is put in water with 0.010 m ca(no3)2. iii) 0.050 m kcl, 0.050 mgcl2, and 0.050 k2so4, all in the same solution. iv) a solution made by mixing 750 ml of 0.10 m agno3 with 250 ml

Broader ApplicationInquiry about Gold (10 points). There is a 10.0 grams necklace made of 18K gold. K, karat, is a measurement of the fineness (or purity) of gold by Jeweler and gold dealers. Compared with 24K (pure gold), 18K means that the mass percent of gold is 75 gold by mass. If the international gold price today is 1323 (US) per troy ounce,

Calcium oxide and carbon dioxide react to form calcium carbonate, like this CaO(s)CO,(g)CaCO3(s) At a certain temperature, a chemist finds that a 3.1 L reaction vessel containing a mixture of calcium oxide, carbon dioxide, and calcium carbonate at equilibrium has the following composition compound amount 23.6 g Cao CO2 9.3 g CaCO3 71.8 g Calculate

Suppose a bag full of ice (450 g) at 0.0 C sits on the counter and begins to melt to liquid water. How much energy must be absorbed by the ice if 23 of it melted

A serving of CheezIts releases 130 kcal (1 kcal 4.18 kJ) when digested by your body. If this same amount of energy were transferred to 2.5 kg of water at 27 C, what would the final temperature be